<!DOCTYPE html>
<html>
    <head>
        <title>
            练习4
        </title>
        <meta charset="UTF-8">
        <meta name="viewport" content="width=device-with, initial-scale=1.0">
        <link rel="stylesheet" href="./练习4.css">
    </head>
    <body>
        <header>
        <span id="zhuce">注册</span>
        <span id="denglu">登陆</span>
        <span id="guanbi">关闭</span>
        </header>
        <table>
            <tr>
                <td class="one">
                    <input id="user" type="text" name="username" value="username">
                </td>
            </tr>
            <tr>
                <td class="one">
                    <input id="password" type="password" name="password" value="password">
                </td>
            </tr>
        </table>

    </body>
</html>